mysql_unlock_tables

THE RISK

High Risk

Unlocking tables releases previously acquired table locks in MySQL, which is an operational/session-level action that affects database concurrency control. It doesn't read, write, or destroy data directly, but it triggers a change in database state (lock release) that can have side effects on concurrent transactions.

From the tool's definition Unlock all tables for the current session

Documented attack patterns abuse exactly the kind of access mysql_unlock_tables gives an agent:

HOW TO CONTROL MYSQL_UNLOCK_TABLES

PolicyLayer is an MCP gateway — it sits between your AI agents and Mcp Windows, and nothing reaches the server without passing your rules. This is the rule we recommend for mysql_unlock_tables:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "mysql_unlock_tables": {
      "limits": [
        {
          "counter": "mysql_unlock_tables_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

mysql_unlock_tables stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

Create a free account and register Mcp Windows — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RATE-LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

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All high-risk MCP tools → Every high-risk tool across the catalogue, and the policy pattern that contains them.
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FAQ

What does the mysql_unlock_tables tool do? +

Unlock all tables for the current session. It is categorised as a Execute tool in the Mcp Windows MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on mysql_unlock_tables? +

Register the Mcp Windows MCP server in PolicyLayer and add a rule for mysql_unlock_tables: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Mcp Windows. Nothing to install.

What risk level is mysql_unlock_tables? +

mysql_unlock_tables is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit mysql_unlock_tables? +

Yes. Add a rate_limit block to the mysql_unlock_tables rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block mysql_unlock_tables completely? +

Set action: deny in the PolicyLayer policy for mysql_unlock_tables. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides mysql_unlock_tables? +

mysql_unlock_tables is provided by the Mcp Windows MCP server (mukul975/mcp-windows-automation). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Mcp Windows tool call.

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// WHAT MYSQL_UNLOCK_TABLES ON MCP WINDOWS DOES

// THE RISK

// HOW TO CONTROL MYSQL_UNLOCK_TABLES

// EXPLORE